398494439 has 8 divisors (see below), whose sum is σ = 464015520. Its totient is φ = 335121696.

The previous prime is 398494427. The next prime is 398494451. The reversal of 398494439 is 934494893.

It is an interprime number because it is at equal distance from previous prime (398494427) and next prime (398494451).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398494439 - 2⁸ = 398494183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398494409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536684 + ... + 537425.

It is an arithmetic number, because the mean of its divisors is an integer number (58001940).

Almost surely, 2^398494439 is an apocalyptic number.

398494439 is a deficient number, since it is larger than the sum of its proper divisors (65521081).

398494439 is a wasteful number, since it uses less digits than its factorization.

398494439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074169.

The product of its digits is 3359232, while the sum is 53.

The square root of 398494439 is about 19962.3254907839. The cubic root of 398494439 is about 735.8807151270.

The spelling of 398494439 in words is "three hundred ninety-eight million, four hundred ninety-four thousand, four hundred thirty-nine".